<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="./lib/vue-2.4.0.js"></script>
</head>

<body>
    <div id="app">
        <input type="button" value="浪起来" @click="lang">
        <input type="button" value="低调" @click="stop">
        <h1>{{ msg }}</h1>
    </div>

    <script>
        var vm = new Vue({
            el: '#app ',
            data: {
                msg: "猥琐发育，别浪~",
                interId: null,
            },
            methods: {
                lang() {
                    if (this.interId == null) {
                        this.interId = setInterval(() => {
                            console.log(this.msg)
                            var start = this.msg.substring(0, 1)
                            var end = this.msg.substring(1)
                            this.msg = end + start
                        }, 400)
                    }
                },
                stop() {
                    if (this.interId != null) {
                        clearInterval(this.interId)
                        this.interId = null
                    }
                }
            }
        });
    </script>
</body>

</html>